ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,392,347, issued on Aug. 19, was assigned to Pratt & Whitney Canada Corp. (Longueuil, Canada).

"Centrifugal compressor impeller and method of producing the same" was invented by Chao Zhang (Vaughan, Canada) and Rambod Larijani (Mississauga, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of producing a centrifugal compressor impeller is provided. The impeller includes a hub with a rotational axis, and forward and aft surfaces. The aft surface extends between an outer radial surface of the impeller and a bore centered on the rotational axis. The method includes: analyzing the impeller to determine a stress field having tangential stress dat...